﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace elmessage
{
    class Program
    {
        static bool notADigit(char a)
        {
            if (a == 0 || a == 1 ||a == 2 || a == 3 ||a == 4 ||a == 5 ||a == 6 ||a == 7 ||a == 8 || a == 9  )
            {
                return false;
            }
            return true;
        }


        static void Main(string[] args)
        {
            int maksSequence = 0;
            string token = Console.ReadLine();
            for (int index = 0; index < token.Length; index++)
            {
                if (!(token[index] > 'a' && token[index] < 'z') || token[index] < 'A'
                   || token[index] > 'Z' || notADigit(token[index]) || token[index] != ' ' )
                {
                    


                }


            }

        }
    }
}
